media: Remove obsolete comment in media/mojo/services/BUILD.gn.

media/mojo/services/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//media/media_options.gni")
 import("//testing/test.gni")
 import("//third_party/mojo/src/mojo/public/mojo_application.gni")
 
 # Target naming conventions:
 # - converters: C++/Mojo type converters.
@@ skipping 160 matching lines @@
       ":renderer_service",
       "//mojo/application",
       "//third_party/mojo/src/mojo/public/c/system:for_shared_library",
     ]
   }
 
   # Note, this 'test' must be loaded via mojo_shell as an app:
   #
   #   out/Debug/mojo_shell mojo:media_test
   #
-  # To get "mojo_shell" you must specify "use_prebuilt_mojo_shell=true" in GN.
   mojo_native_application("media_test") {
     testonly = true
 
     deps = [
       "//media/test:mojo_pipeline_integration_tests",
     ]
   }
 }
 
 group("services") {
@@ skipping 10 matching lines @@
 group("tests") {
   testonly = true
   deps = [
     ":media_mojo_unittests",
   ]
 
   if (!is_component_build) {
     deps += [ ":media_test" ]
   }
 }